CN213982238U

CN213982238U - Electric proportional pilot-operated overflow valve

Info

Publication number: CN213982238U
Application number: CN202022056950.XU
Authority: CN
Inventors: 林福明
Original assignee: Ningbo Zhenhai Tiandi Hydraulic Co ltd
Current assignee: Ningbo Zhenhai Tiandi Hydraulic Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-08-17
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses an electric proportion pilot operated overflow valve, which comprises a main valve sleeve, a valve seat, a flux sleeve, a coil and a coil nut, wherein the main valve sleeve is connected with a pilot valve component in the valve seat, the valve seat is connected with the flux sleeve, the coil is limited outside the flux sleeve through the coil nut, the main valve sleeve is provided with a first working port and a second working port, a movable valve core component is arranged in the main valve, the valve core component is provided with a gap hole, a spring and a cavity are arranged between the valve core component and the pilot valve component, the pilot valve component is provided with a damping sheet, the damping sheet is provided with a flow passage hole, the pilot valve component is provided with an overflow valve port, an overflow passage is arranged between the pilot valve component and the valve seat, the main valve sleeve and the valve seat are provided with an overflow port, the gap hole, the cavity, the flow passage hole, the overflow valve port, the overflow passage and the overflow port are correspondingly communicated, and the overflow valve port is provided with a cone valve core for controlling the overflow valve port to be opened or closed, a movable moving iron core part is arranged in the magnetic conduction sleeve and connected to the conical valve core.

Description

Electric proportional pilot-operated overflow valve

Technical Field

The utility model relates to an overflow valve technical field refers in particular to an electric proportion pilot operated overflow valve.

Background

The overflow valve is a hydraulic pressure control valve, and mainly plays the roles of constant pressure overflow, pressure stabilization, system unloading and safety protection in hydraulic equipment. When the overflow valve is assembled or used, due to the damage of an O-shaped sealing ring and a combined sealing ring, or the looseness of a mounting screw and a pipe joint, unnecessary external leakage can be caused, if the conical valve or the main valve core is excessively abraded, or the contact of the sealing surface is poor, the internal leakage is also excessively large, and even the normal work is influenced. At present, overflow valves on the market have the defects of overflow pressure relief.

Therefore, there is a need for improvements in the prior art.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides an electricity proportion guide's formula overflow valve effectively solves the not enough of prior art.

In order to achieve the above purpose, the utility model discloses the technical scheme who uses as follows:

an electric proportional pilot overflow valve comprises a main valve sleeve, a valve seat, a magnetic conductive sleeve, a coil and a coil nut, wherein the main valve sleeve is connected with a pilot valve component in the valve seat, the valve seat is connected with the magnetic conductive sleeve, the coil is limited outside the magnetic conductive sleeve through the coil nut, a first working port and a second working port are arranged on the main valve sleeve, a movable valve core component is arranged in the main valve, a main valve port for controlling the first working port and the second working port to be communicated or closed is arranged between the valve core component and the main valve sleeve, a gap hole is arranged on the valve core component, a spring and a cavity are arranged between the valve core component and the pilot valve component, a damping sheet which is arranged in a manner of being abutted against the spring is arranged at one end of the pilot valve component, a flow passage hole is arranged on the damping sheet, an overflow valve port is arranged at the other end of the pilot valve component, an overflow passage is arranged between the pilot valve component and the valve seat, an overflow port, a gap hole, a cavity is arranged between the main valve sleeve and the valve seat, The flow passage hole, the overflow valve port, the overflow passage and the overflow port are correspondingly communicated, the overflow valve port is provided with a cone valve core for controlling the overflow valve port to be opened or closed, a movable iron core part is arranged in the magnetic conduction sleeve, and the movable iron core part is connected to the cone valve core.

According to the scheme, the diameter of the flow passage hole is larger than that of the clearance hole.

According to the scheme, the iron core assembly further comprises a pressure regulating assembly, the pressure regulating assembly comprises a pressure regulating screw, a locking nut and a fixing block, the pressure regulating screw corresponds to the movable iron core component and is limited on the fixing block through the locking nut.

According to the scheme, the valve seat is provided with the first rubber ring.

According to the scheme, the main valve sleeve is provided with the check ring and the rubber ring II.

According to the scheme, a third rubber ring is arranged between the pressure regulating screw and the fixing block.

The utility model discloses beneficial effect:

the utility model discloses a such structure setting, when first working port oil pressure risees, through to the coil circular telegram, make the movable core part remove to pressing of awl case to make the awl case open the overflow valve port, realize flowing the fluid medium in the cavity to the overflow mouth through the overflow passageway and discharge, and then realize carrying out the overflow pressure release to first working port, also can realize carrying out the overflow pressure release to the second working port.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the location A in FIG. 1;

1. a main valve sleeve; 2. a valve core component; 3. a spring; 4. a damping fin; 41. a flow passage hole; 5. a pilot valve member; 6. a moving iron core member; 7. a pressure regulating screw; 8. a flux sleeve; 9. locking the nut; 10. a coil nut; 11. a rubber ring I; 12. a retainer ring; 13. a second rubber ring; 14. a third rubber ring; 15. a coil; 16. an overflow channel; 17. an overflow port; 18. a cone valve core; 19. a cavity; 20. an overflow valve port; 21. a first working port; 22. a second working port; 23. a clearance hole; 24. a main valve port; 25. a valve seat; 26. and (5) fixing blocks.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings and examples.

As shown in fig. 1 and fig. 2, the present invention relates to an electric proportional pilot overflow valve, which comprises a main valve sleeve 1, a valve seat 25, a flux sleeve 8, a coil 15 and a coil nut 10, wherein the main valve sleeve 1 is connected to a pilot valve component 5 in the valve seat 25, the valve seat 25 is connected to the flux sleeve 8, the coil 15 is limited outside the flux sleeve 8 through the coil nut 10, the main valve sleeve 1 is provided with a first working port 21 and a second working port 22, the main valve sleeve 1 is internally provided with a movable valve element component 2, a main valve port 24 for controlling the first working port 21 and the second working port 22 to be communicated or closed is arranged between the valve element component 2 and the main valve sleeve 1, the valve element component 2 is provided with a gap 23, a spring 3 and a cavity 19 are arranged between the valve element component 2 and the pilot valve component 5, one end of the pilot valve component 5 is provided with a damping sheet 4 abutting against the spring 3, the damping sheet 4 is provided with a flow passage hole 41, the other end of the pilot valve component 5 is provided with an overflow valve port 20, an overflow channel 16 is arranged between the pilot valve component 5 and the valve seat 25, an overflow port 17 is arranged between the main valve sleeve 1 and the valve seat 25, the clearance hole 23, the cavity 19, the flow passage hole 41, the overflow valve port 20, the overflow channel 16 and the overflow port 17 are correspondingly communicated, a cone valve core 18 for controlling the overflow valve port 20 to be opened or closed is arranged on the overflow valve port 20, a movable iron core component 6 is arranged in the magnetic conduction sleeve 8, and the movable iron core component 6 is connected to the cone valve core 18. The above structure constitutes the basic structure of the utility model.

Wherein the diameter of the flow passage hole 41 is larger than the diameter of the clearance hole 23. With this arrangement, the pressure in the chamber 19 is gradually increased.

The pressure regulating assembly comprises a pressure regulating screw 7, a locking nut 9 and a fixing block 26, the pressure regulating screw 7 is arranged corresponding to the movable iron core component 6 and limited on the fixing block 26 through the locking nut 9, a first rubber ring 11 is arranged on the valve seat 25, a check ring 12 and a second rubber ring 13 are arranged on the main valve sleeve 1, and a third rubber ring 14 is arranged between the pressure regulating screw 7 and the fixing block 26. By adopting the structure, the upward distance of the movable iron core component 6 is adjusted by adjusting the distance between the pressure adjusting screw 7 and the movable iron core component 6, so that the distance that the movable iron core component 6 drives the cone valve core 18 to move upwards is controlled, and the size of the overflow valve port 20 is adjusted.

The utility model discloses a theory of operation:

when the fluid medium is supplied to the working port 21:

in the first-stage state,

the fluid medium pushes the main valve element 2 upwards, the main valve element 2 overcomes the elastic force of the spring 3 and moves upwards, at the moment, the main valve port 24 is opened, the first working port 21 is communicated with the second working port 22, most of the fluid medium of the first working port 21 flows to the second working port 22 through the main valve port 24, and meanwhile, a small part of the fluid medium flows to the cavity 19 from the gap hole 23;

in the second-stage state, the first-stage state,

along with the extension of the working time, fluid medium continuously flows from the clearance hole 23 to the cavity 19 through the first working port 21, so that the pressure of the cavity 19 gradually rises, at the moment, the main valve element 2 is subjected to the downward pressure of the oil pressure of the spring 3 and the cavity 19, and meanwhile, the conical valve element 18 is also subjected to the upward pressure of the cavity 19;

in the third-stage state, the first-stage state,

if the oil pressure of the first working port 21 suddenly rises, the oil pressure of the cavity 19 also increases, at this time, a sensor in the pipeline system detects the pressure change of the working port 21, so that the coil 15 is electrified, the movable iron core 6 releases the pressing force on the cone valve core 18, the cone valve core 18 moves upwards under the action of the pressure of the cavity 19, the overflow valve port 17 is opened, and the fluid medium in the cavity 19 flows to the overflow port 17 through the overflow channel 16, so that the overflow pressure is released for the first working port 21.

If the oil pressure of the first working port 21 is stable and normal, the main valve element 2 is gradually moved downwards due to the downward pressure of the oil pressure of the spring 3 and the cavity 19, the opening degree of the main valve port 24 is gradually reduced, so that the flow rate of the second working port 22 is reduced, the pressure of a pipeline connected with the second working port 22 is reduced, at this time, a sensor in a pipeline system detects the pressure change of the second working port 22, the coil 15 is electrified, the movable iron core 6 releases the pressing force on the conical valve element 18, the conical valve element 18 moves upwards under the pressure of the cavity 19, the overflow valve port 17 is opened, the fluid medium in the cavity 19 flows to the overflow port 17 through the overflow channel 16, the cavity 19 overflows to release the pressure, the main valve element 2 moves upwards, and the opening degree of the main valve port 24 is increased. The operation is repeated in such a cycle, so that the second working port 22 can always maintain stable output pressure.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, and these forms are within the scope of the present invention.

Claims

1. An electric proportional pilot operated relief valve, its characterized in that: the valve comprises a main valve sleeve (1), a valve seat (25), a magnetic conductive sleeve (8), a coil (15) and a coil nut (10), wherein the main valve sleeve (1) is connected with a pilot valve component (5) in the valve seat (25), the valve seat (25) is connected with the magnetic conductive sleeve (8), the coil (15) is limited outside the magnetic conductive sleeve (8) through the coil nut (10), a first working opening (21) and a second working opening (22) are arranged on the main valve sleeve (1), a movable valve core component (2) is arranged in the main valve sleeve (1), a main valve opening (24) for controlling the first working opening (21) and the second working opening (22) to be communicated or closed is arranged between the valve core component (2) and the main valve sleeve (1), a gap hole (23) is arranged on the valve core component (2), and a spring (3) and a cavity (19) are arranged between the valve core component (2) and the pilot valve component (5), one end of the pilot valve component (5) is provided with a damping sheet (4) which is abutted against the spring (3), the damping sheet (4) is provided with a flow channel hole (41), the other end of the pilot valve component (5) is provided with an overflow valve port (20), an overflow channel (16) is arranged between the pilot valve component (5) and the valve seat (25), an overflow port (17) is arranged between the main valve sleeve (1) and the valve seat (25), the gap hole (23), the cavity (19), the flow channel hole (41), the overflow valve port (20), the overflow channel (16) and the overflow port (17) are correspondingly communicated, the overflow valve port (20) is provided with a cone valve core (18) which controls the overflow valve port (20) to be opened or closed, a movable moving iron core component (6) is arranged in the magnetic conductive sleeve (8), and the moving iron core component (6) is connected to the cone valve core (18).

2. The electric proportional pilot operated relief valve according to claim 1, wherein: the diameter of the flow passage hole (41) is larger than that of the clearance hole (23).

3. The electric proportional pilot operated relief valve according to claim 1, wherein: still include the pressure regulating subassembly, the pressure regulating subassembly includes pressure regulating screw (7), lock nut (9) and fixed block (26), pressure regulating screw (7) correspond the setting with moving iron core part (6) to it is spacing on fixed block (26) through lock nut (9).

4. The electric proportional pilot operated relief valve according to claim 1, wherein: and a first rubber ring (11) is arranged on the valve seat (25).

5. The electric proportional pilot operated relief valve according to claim 1, wherein: a check ring (12) and a rubber ring II (13) are arranged on the main valve sleeve (1).

6. The electric proportional pilot operated relief valve according to claim 3, wherein: and a third rubber ring (14) is arranged between the pressure regulating screw (7) and the fixed block (26).